I drilled up a QZ2 70x2.5x40 and love it for med.oil  it's clean in the heads,makes a nice controlled arc in the mid lane and has a slight flip on the backend. everyone's situation is different but all in all this is a great ball IMO.

my stats:
speed-16-18 at the deck
revs-400's
tilt-10*
axis rot-45 average
pap 47/8>7/16^

hope this helps!
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The harder I try the harder they fall

I would say go with a SR2 (do to your speed) with a little more aggressive drill to produce a earlier roll. Some where in the idea if 40x4x65 with a hole down.  This should give you a early read with a slower response off the dry.  Hard to give a exact drill pattern without knowing tilt,rotation and pap.

The QZ2 would work but I think you would have to hit the cover to get the reaction your looking for.  Why make a apple an orange?

Being that you have two asymmetrical balls already picking up a symmetrical ball with a control or smoother layout will be a great addition to your arsenal.

Only a suggestion hope this helps,

RC